It is reported that Zainab (RA) bint Jahash was not happy with the proposal of her marriage with Zaid bin Hartha (RA). She agreed to the proposal when Allah (S.T.) revealed this verse.

It is not fitting for a Believer man or woman when a matter has been decided by Allah and His Apostle to have any option about their decision: if anyone disobeys Allah and His Apostle he is indeed on a clearly wrong Path.
It was a tradition in the Arabs to adopt sons and they were treated as the real ones. The wives of the adopted sons were in the same position as that of real daughter-in-laws. It was therefore not considered to bring them under their marriages. Allah (S.T.) send down Angel Jibrael and informed the Holy Prophet (pbuh) to marry Zainab (RA) bint Jahash. The Holy Prophet (pbuh), by taking the existing problem (of not marrying the widow of the adopted sons) into consideration and was much worried as to how the people would feel if he (pbuh) marries with Zainab (RA).In the meantime Allah (S.T.) revealed as:

Muhammad is not the father of any of your men but (he is) the Apostle of Allah and the Seal of the Prophets: and Allah has full knowledge of all things.
Allah (S.T.) had decided to give her hand in the marriage with the Holy Prophet (pbuh) by revealing the following verse as:

Behold! thou didst say to one who had received the grace of Allah and thy favor: “Retain thou (in wedlock) thy wife and fear Allah.” But thou didst hide in thy heart that which Allah was about to make manifest: thou didst fear the people but it is more fitting that thou shouldst fear Allah. Then when Zaid had dissolved (his marriage) with her with the necessary (formality) We joined her in marriage to thee: in order that (in future) there may be no difficulty to the Believers in (the matter of) marriage with the wives of their adopted sons when the latter have dissolved with the necessary (formality) (their marriage) with them: and Allah’s command must be fulfilled.
The old age tradition of not to marrying the wives of the adopted sons was discarded and it was declared that the adopted sons can not be considered as real ones and the widows of them one within the permisible limits of marriage. They should be called by their fathers name, they are “Brothers in Faith”. Further Allah (S.T.) guaranteed security of privacy to the Prophet’s household in these words as:

O ye who Believe! enter not the Prophet’s houses until leave is given you for a meal (and then) not (so early as) to wait for its preparation: but when ye are invited enter; and when ye have taken your meal disperse without seeking familiar talk. Such (behavior) annoys the Prophet: He is ashamed to dismiss you but Allah is not ashamed (to tell you) the truth. And when ye ask (his ladies) for anything ye want ask them from before a screen: that makes for greater purity for your hearts and for theirs. Nor is it right for you that ye should annoy Allah’s Apostle or that ye should marry his widows after him at any time. Truly such a thing is in Allah’s sight an enormity.
Zainab (RA) bint Jahash died in 20 Hijra when in the period of Caliph Umer Farooq (RA). Umer Farooq (RA) offered her funeral prayer and she was burried in the “Janatul-Baqi”(Graveyard). She was 51 years old when she died. She had prepared her shroud (Kafan) by herself.
MAY ALLAH (S.T.) BE PLEASED WITH HER.
Ummul mo’mineen Hazrat Zainab bint Jahsh radiy-Allāhu ta’ala anha :
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Aap ki wilaadat 593 A.D. me hui.
Aap ke waalid ka naam Jahsh ibn Riyab aur waalida ka naam Umama binte Abdul Muttalib hai.
Aap ki waalida Huzoor sallallāhu alaihi wa sallam ke waalid Hazrate Abdullāh ki bahen thi.
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3 Hijri (625 A.D.) me Aap ka Nikaah Hazrat Zaid ibn Haariṡah radiy-Allāhu ta’ala anhu se hua jo Hazrate Khadeeja bint Khuwailid radiy-Allāhu ta’ala anha ke Ghulaam the aur jin ko Huzoor sallallāhu alaihi wa sallam ne god lekar apna munh bola beta banaaya tha.
5 Hijri (626 A.D.) Jab Hazrat Zaid ibn Haariṡah ne Aap ko talaaq de diya.
Us ke baad Aap ka nikaah Huzoor sallallāhu alaihi wa sallam ke saath hua to ALLĀH ta’ala ne Aayat naazil farmai : ‘Phir jab Zaid ne use [Zainab ko] talaaq dene ki garz puri kar li, to hum ne us se Aap ka nikaah kar diya taake mo’mino par un ke munh bole beto ki biwiyo (ke saath nikaah) ke baare me koi harj na rahe jab ke wo (talaaq dekar) un se alag ho gaye ho, Aur ALLĀH ka hukm to pura kiya jaane waala hi tha.’ (Qur’an : Surah al-Ahzaab, Aayat 37).
Nikaah ke waqt Aap ki umr 35 saal aur Huzoor sallallāhu alaihi wa sallam 58 saal thi.
Nikaah ke baad Huzoor sallallāhu alaihi wa sallam ne daawat-e-Waleema ki jis me ek bakri zubah ki gai aur 300 logo ko khaana khilaaya gaya. Khaana khaane ke baad log usi kamre baithkar baato me mashgool ho gaye to ALLĀH ta’ala ne Aayat naazil farmaai :
‘Aye Eimaan waalo! Nabi ke ghar me daakhil na hua karo siwa e us k eke tumhe khaana khaane ke liye ijaazat di jaaye (magar) khaana pakne ka intazaar karne waale na bana karo, Haan jab tum (khaana kaahne ke liye andar) bulaaye jaao to andar aaya karo phir jab khaana kha chuko to foran muntashar ho jaaya karo aur waha baato me dil lagaakar (der tak) baithe rehne waale na bano, Yaqeenan tumhara aisa rehna nabi ko takleef deta hai aur woh tum se (chale jaane ko kehne me) sharmaate hain aur ALLĀH haq (baat bataane) se nahi sharmaata.’ (Qur’an : 33 Surah al-Ahzaab, Aayat 53)
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Aap bahot zayada Muttaqi, Sakhi, Ibaadat guzaar aur Saadiqa thi.
Aap akṡar Roza rakhti thi aur raat me uthkar ibaadat kiya karti thi.
Aap ibaadat karte karte thak jaati to ek rassi ke sahaare se khadi hoti magar ibaadat jaari rakhti.
Huzoor sallallāhu alaihi wa sallam ne rassi ko dekhkar kisi se puchha to is baat ka pata chala tab Huzoor sallallāhu alaihi wa sallam ne sahaba se faramaaya ke ‘Ise khol do. Jab tak tum taaza ho tab tak ibaadat karo. Jab tum thak jaao ya tumhari tawajjoh na rahe tab tumhe rook jaana chaahiye.’
Aap jaanwaro ke chamde ko sukhaakar us ko see kar use bechti thi aur jo raqam milti thi use haajatmando ko khairaat karti thi.
Ek martaba Huzoor sallallāhu alaihi wa sallam apni Azwaaj e Mutah’hiraat se farmaaya ‘(Mere wisaal ke baad) Tum me sab se pehle mujhe woh milegi, jis ke Haath lambe honge.’
Azwaaj e mutah’hiraat radiy-Allāhu anhuma ek jagah jama hokar apne haatho ko naapne lagi to pata chala ke sab me Hazrat Saudah binte Jama’a radiy-Allāhu anha ke haath taweel the.
Magar sab se pehle Hazrat Zainab binte Jahsh radiy-Allāhu anha ka wisaal hua. Tab pata chala ke Huzoor sallallāhu alaihi wa sallam ke farmaan me Daraaz e Dast (Haath ki Tawaalat) se muraad Sadqah aur Neki me kaṡrat thi aur yeh khoobi sab se zyada Hazrat Zainab binte Jahsh radiy-Allāhu anha me paai jaati thi.
Hazrat Umar Faarooq radiy-Allāhu anhu ke zamaane me Faars (Iran) par fateh haasil hui to Sultaan Chosroes ka bahot bada khazaana haasil hua. Jab Hazrat Umar Faarooq radiy-Allāhu anhu us maal ko taqseem kar rahe the tab us me se kuchh hissa unho ne Azwaaj e mutah’hiraat radiy-Allāhu anhuma ko ko bhi bheja. Hazrat Zainab binte Jahsh radiy-Allāhu anha ne apni khaadima ko Madeena munawwara ke ghurba ki fehrist banakar di aur apne hisse ke maal me se un sab ko dene ke liye farmaaya. Sab ko dene ke baad jab khaadima ne baaqi 80 deenaar Aap ki khidmat me pesh kiye to Aap ne ALLĀH ki marzi maankar use rakh liye. Phir dua farmaai ke ‘Aye ALLĀH! Aa’inda mujhe itna saara maal mat dena kyun ki mumkin hai ke mujh me maal ki laalach paida ho jaaye.’
ALLĀH ta’ala ne Aap ki dua qaubool farmaai aur kuchh arse baad jab Hazrat Umar Faarooq radiy-Allāhu anhu ko phir se maal mila aur Azwaaj e mutah’hiraat radiy-Allāhu anhuma ko us maal me se hissa dene ke liye aaye to us se pehle hi Aap ka wisaal ho chuka tha.
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Aap ka wisaal 14 Rajab 21 Hijri (June 642 A.D.) ko hua.
Aap ka mazaar Jannatul Baqi, Madeena munawwara me hai.
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ALLĀH ta’ala us ke Habeeb sallallāhu alaihi wa sallam ke sadqe me
Aur Ummul mo’mineen Hazrat Zainab bint Jahsh radiy-Allāhu ta’ala anha aur tamaam Auliya Allāh aur Ahle bait aur Ashaaba ke waseele se
Sab ko mukammal ishq e Rasool ata farmae aur Sab ke Eimaan ki hifaazat farmae aur Sab ko nek amal karne ki taufiq ata farmae.
Aur Sab ko dunya wa aakhirat me kaamyaabi ata farmae aur Sab ki nek jaa’iz muraado ko puri farmae.
Aameen.